Wall box



FIG. 1 is a top, side and front isometric view of a wall box and showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side elevational view being a mirror image. 

An ornamental design for a wall box, as shown and described. 